﻿//= =本JS是加载Lodop插件或Web打印服务CLodop/Lodop7的综合示例，可直接使用，建议理解后融入自己程序==

// 用双端口加载主JS文件Lodop.js(或CLodopfuncs.js兼容老版本)以防其中某端口被占:
var MainJS = 'CLodopfuncs.js',
  URL_WS1 = 'ws://localhost:8000/' + MainJS, // ws用8000/18000
  URL_WS2 = 'ws://localhost:18000/' + MainJS,
  URL_HTTP1 = 'http://localhost:8000/' + MainJS, // http用8000/18000
  URL_HTTP2 = 'http://localhost:18000/' + MainJS,
  URL_HTTP3 = 'https://localhost.lodop.net:8443/' + MainJS // https用8000/8443

var CreatedOKLodopObject, CLodopIsLocal, LoadJsState

//= =判断是否需要CLodop(那些不支持插件的浏览器):==
function needCLodop () {
  try {
    var ua = navigator.userAgent
    if (ua.match(/Windows\sPhone/i) ||
            ua.match(/iPhone|iPod|iPad/i) ||
            ua.match(/Android/i) ||
            ua.match(/Edge\D?\d+/i)) { return true }
    var verTrident = ua.match(/Trident\D?\d+/i)
    var verIE = ua.match(/MSIE\D?\d+/i)
    var verOPR = ua.match(/OPR\D?\d+/i)
    var verFF = ua.match(/Firefox\D?\d+/i)
    var x64 = ua.match(/x64/i)
    if ((!verTrident) && (!verIE) && (x64)) return true
    else if (verFF) {
      verFF = verFF[0].match(/\d+/)
      if ((verFF[0] >= 41) || (x64)) return true
    } else if (verOPR) {
      verOPR = verOPR[0].match(/\d+/)
      if (verOPR[0] >= 32) return true
    } else if ((!verTrident) && (!verIE)) {
      var verChrome = ua.match(/Chrome\D?\d+/i)
      if (verChrome) {
        verChrome = verChrome[0].match(/\d+/)
        if (verChrome[0] >= 41) return true
      }
    }
    return false
  } catch (err) {
    return true
  }
}

//= =检查加载成功与否，如没成功则用http(s)再试==
//= =低版本CLODOP6.561/Lodop7.043及前)用本方法==
function checkOrTryHttp () {
  if (window.getCLodop) {
    LoadJsState = 'complete'
    return true
  }
  if (LoadJsState == 'loadingB' || LoadJsState == 'complete') return
  LoadJsState = 'loadingB'
  var head = document.head || document.getElementsByTagName('head')[0] || document.documentElement
  var JS1 = document.createElement('script'),
    JS2 = document.createElement('script'),
    JS3 = document.createElement('script')
  JS1.src = URL_HTTP1
  JS2.src = URL_HTTP2
  JS3.src = URL_HTTP3
  JS1.onload = JS2.onload = JS3.onload = JS2.onerror = JS3.onerror = function () { LoadJsState = 'complete' }
  JS1.onerror = function (e) {
    if (window.location.protocol !== 'https:') { head.insertBefore(JS2, head.firstChild) } else { head.insertBefore(JS3, head.firstChild) }
  }
  head.insertBefore(JS1, head.firstChild)
}

//= =加载Lodop对象的主过程:==
(function loadCLodop () {
  if (!needCLodop()) return
  CLodopIsLocal = !!((URL_WS1 + URL_WS2).match(/\/\/localho|\/\/127.0.0./i))
  LoadJsState = 'loadingA'
  if (!window.WebSocket && window.MozWebSocket) window.WebSocket = window.MozWebSocket
  // ws方式速度快(小于200ms)且可避免CORS错误,但要求Lodop版本足够新:
  try {
    var WSK1 = new WebSocket(URL_WS1)
    WSK1.onopen = function (e) { setTimeout('checkOrTryHttp();', 200) }
    WSK1.onmessage = function (e) { if (!window.getCLodop) eval(e.data) }
    WSK1.onerror = function (e) {
      var WSK2 = new WebSocket(URL_WS2)
      WSK2.onopen = function (e) { setTimeout('checkOrTryHttp();', 200) }
      WSK2.onmessage = function (e) { if (!window.getCLodop) eval(e.data) }
      WSK2.onerror = function (e) { checkOrTryHttp() }
    }
  } catch (e) {
    checkOrTryHttp()
  }
})()

//= =获取LODOP对象主过程,判断是否安装、需否升级:==
function getLodop (oOBJECT, oEMBED) {
  var strFontTag = "<br><font color='#FF00FF'>打印控件"
  var strLodopInstall = strFontTag + "未安装!点击这里<a href='install_lodop32.exe' target='_self'>执行安装</a>"
  var strLodopUpdate = strFontTag + "需要升级!点击这里<a href='install_lodop32.exe' target='_self'>执行升级</a>"
  var strLodop64Install = strFontTag + "未安装!点击这里<a href='install_lodop64.exe' target='_self'>执行安装</a>"
  var strLodop64Update = strFontTag + "需要升级!点击这里<a href='install_lodop64.exe' target='_self'>执行升级</a>"
  var strCLodopInstallA = "<br><font color='#FF00FF'>Web打印服务CLodop未安装启动，点击这里<a href='CLodop_Setup_for_Win32NT.exe' target='_self'>下载执行安装</a>"
  var strCLodopInstallB = "<br>（若此前已安装过，可<a href='CLodop.protocol:setup' target='_self'>点这里直接再次启动</a>）"
  var strCLodopUpdate = "<br><font color='#FF00FF'>Web打印服务CLodop需升级!点击这里<a href='CLodop_Setup_for_Win32NT.exe' target='_self'>执行升级</a>"
  var strLodop7FontTag = "<br><font color='#FF00FF'>Web打印服务Lodop7"
  var strLodop7HrefX86 = "点击这里<a href='Lodop7_Linux_X86_64.tar.gz' target='_self'>下载安装</a>(下载后解压，点击lodop文件开始执行)"
  var strLodop7HrefARM = "点击这里<a href='Lodop7_Linux_ARM64.tar.gz'  target='_self'>下载安装</a>(下载后解压，点击lodop文件开始执行)"
  var strLodop7Install_X86 = strLodop7FontTag + '未安装启动，' + strLodop7HrefX86
  var strLodop7Install_ARM = strLodop7FontTag + '未安装启动，' + strLodop7HrefARM
  var strLodop7Update_X86 = strLodop7FontTag + '需升级，' + strLodop7HrefX86
  var strLodop7Update_ARM = strLodop7FontTag + '需升级，' + strLodop7HrefARM
  var strInstallOK = '，成功后请刷新本页面或重启浏览器。</font>'
  var LODOP
  try {
    var isWinIE = (/MSIE/i.test(navigator.userAgent)) || (/Trident/i.test(navigator.userAgent))
    var isWinIE64 = isWinIE && (/x64/i.test(navigator.userAgent))
    var isLinuxX86 = (/Linux/i.test(navigator.platform)) && (/x86/i.test(navigator.platform))
    var isLinuxARM = (/Linux/i.test(navigator.platform)) && (/aarch/i.test(navigator.platform))

    if (needCLodop() || isLinuxX86 || isLinuxARM) {
      try {
        LODOP = window.getCLodop()
      } catch (err) {}
      if (!LODOP && LoadJsState !== 'complete') {
        if (!LoadJsState) { alert('未曾加载Lodop主JS文件，请先调用loadCLodop过程.') } else { alert('网页还没下载完毕，请稍等一下再操作.') }
        return
      }
      var strAlertMessage
      if (!LODOP) {
        if (isLinuxX86) { strAlertMessage = strLodop7Install_X86 } else if (isLinuxARM) { strAlertMessage = strLodop7Install_ARM } else { strAlertMessage = strCLodopInstallA + (CLodopIsLocal ? strCLodopInstallB : '') }
        document.body.innerHTML = strAlertMessage + strInstallOK + document.body.innerHTML
        return
      } else {
        if (isLinuxX86 && LODOP.CVERSION < '7.0.4.3') { strAlertMessage = strLodop7Update_X86 } else if (isLinuxARM && LODOP.CVERSION < '7.0.4.3') { strAlertMessage = strLodop7Update_ARM } else if (CLODOP.CVERSION < '6.5.6.9') { strAlertMessage = strCLodopUpdate }

        if (strAlertMessage) { document.body.innerHTML = strAlertMessage + strInstallOK + document.body.innerHTML }
      }
    } else {
      //= =如果页面有Lodop插件就直接使用,否则新建:==
      if (oOBJECT || oEMBED) {
        if (isWinIE) { LODOP = oOBJECT } else { LODOP = oEMBED }
      } else if (!CreatedOKLodopObject) {
        LODOP = document.createElement('object')
        LODOP.setAttribute('width', 0)
        LODOP.setAttribute('height', 0)
        LODOP.setAttribute('style', 'position:absolute;left:0px;top:-100px;width:0px;height:0px;')
        if (isWinIE) { LODOP.setAttribute('classid', 'clsid:2105C259-1E0C-4534-8141-A753534CB4CA') } else { LODOP.setAttribute('type', 'application/x-print-lodop') }
        document.documentElement.appendChild(LODOP)
        CreatedOKLodopObject = LODOP
      } else { LODOP = CreatedOKLodopObject }
      //= =Lodop插件未安装时提示下载地址:==
      if ((!LODOP) || (!LODOP.VERSION)) {
        document.body.innerHTML = (isWinIE64 ? strLodop64Install : strLodopInstall) + strInstallOK + document.body.innerHTML
        return LODOP
      }
      if (LODOP.VERSION < '6.2.2.6') {
        document.body.innerHTML = (isWinIE64 ? strLodop64Update : strLodopUpdate) + strInstallOK + document.body.innerHTML
      }
    }
    //= ==如下空白位置适合调用统一功能(如注册语句、语言选择等):=======================

    //= ==============================================================================
    return LODOP
  } catch (err) {
    alert('getLodop出错:' + err)
  }
}
